Bridge.



J. B. STRAUSS.

BRIDGE.

APPL1cAT1oN FILED APR.1,1913.

1.171,553. Patented Feb.15,19111.

2 SHEETSv-SHEET l.

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1. B. STRAUS.Q

BRIDGE.

APPLICATION FILED APR. I. I9I3.

Patented Feb. 15, 191,6.

2 SHEETS-SHEET 2.

JOSEPH B. STRAUSS. F CHICAGO. ILLINOIS.

BRIDGE.

Application filed April 1, 1913.

Zhu/1 'r/mm itmay concern.'

Be it known that I, JOSEPH B. Srnaoss7 a citizen of the United States,residing at Chicago. in the county of Cook and State ot' lliinois. haveinvented a certain new and useful linprovement in Bridges, of which thet'olhiwmg 1s a specication.

lhis invention relates to bridges and has for its object to provide anew and improved bridge of the bascule type.

The inrention is illustrated in the aceompanving drawings wherein-Figur.. 1 is a view showing one form of bridge embodying the invention:Fig. 2 is a plan view of the device shown in Fig. 1; Fig. is a viewshowing a modified construe lion; Fig. 4 is a perspective view showing aportion of the counterweight; Fig. 5 is a view showing the method ofreinforcing the ronnterweight.

Lilie numerals refer to like parts throughout the several figures.

Referring now to Figs. 1 and 2 of the drawings, I have shown a movablespan 1 pivotally mounted at 2 upon the supports 3. A eonnterweightframeor support 4 is connected with the movable span and is providedwith a counterweight The counterweight frame or support 4 has aplurality of angular-ly disposed members, said members having an angularopen space between them, the open end of the space being at the bottomthereof. As shown in Fig. 1, the-counterwe'ght trame has connectingmembers and i extending upwardly from the counter'- weight andl thesupport for the counter- Qvcight trame. said members being connected ai:i point. above the plane passing through the. lower ends thereof, `theconnection being shown at. the point 8. This connection allows themovable span to be moved to its open position without the counterweighttrame coming in Contact with any of the Statiooarj parts. ln theconstruction shown in i`igs. l and 2. the trunnions of the movA ablespan l have inside bearings fl and outside bearings (see Fig. '2). Thereis an insult post or support for each inside bearing and a brave ilbetween each of said posts and the fixed portion 1; so as to take thehorizontal thrust on sai-.l inside bearings. Thisv fixed support 13 i'sshown as a girder extending across between the stationary pieifes i3 ot'the fixed portion of the. bridge. The braces 11 form linee bracesbetween the Speeification of Letters Patent.

Patented Feb. .15, H6.

Serial No. 758,140.

supports for the bearings and the stationary piece or garder 12. A

Figs. 3, l and 5 show a construction where- Ain the counterweight 5 isprovided with a series of angular members llembedded in the concrete andconnected with the couuterweight support. These angular members 14 are.preferably arranged to form triangular trusses; There are also a seriesof intel-conneet-ing members 15 between the triangular trusses, thetriangular trusses and interconnecting members being embedded in theconcrete. The counterweight is provided with a bottom portion lo andside portions 1T. The side portions 17 are. preferably supported uponthe angular members or trusses ot' the. eounterweight irrany desiredmanner and the concrete. is then applied'. said bottom and side portionsacting as a self-supporting frame for the counterweight while theconcreteis being erected. thereby making it unnecessary to have falsework for this purpose.

It will be seen that there is here provided a. bridge having acounter-weight frame connected therewith and a rigid counterweight tixedto said counterweight frame'and depending therefrom when the bridge isclosed.

As illustrated` the pieces 1T and 1G are suspended on the ounterweighttruss bv means of bolts 18. Soin-` suitable. operating mechanism isprovided for moving the main span about its pivots. such as for example,the rack 19 and the pinion 20. The Counterweight is located below theroadway 21.

By means of this construction where the tail end of the main Span hasthe reiintrant angle, that is the construction where there is an angularopen space between the members into which the cross fixed support mayenter as the bridge is lifted, provides an efficient means for usingthis cross support and still getting the full opening of the bridge anda construction in which the cost is very materially reduced. Theconstruction of the eounterweight, also, reduces the cost. as theparticular manner in which the metal is disposed is much more economicaland permits theI use of a concrete cfuinterweight greatly reduced incost and vet efiiciently supported and of the proper strength anddurability. Thisv construction was particuiarlv provided to avoiddifficulties found in attempting to adapt in actual practice the largeconcrete counterweights necessary for llO large bridges and which haveto be changed in position so as to change thestrainsas the bridge isopened and closed.

I claim:

1. A bascule bridge comprising a movable span. a counterweight frameassociated with said movable span upon which the counterweight issupported, saidV counterweight frame having a plurality of angularlydisposed members, said members having an angular open space betweenthem, the o'pen end of said space being' at the bottom thereof', a crosssupport extending under said movable span, inside and outside bearingsFfor said movable span, mounted upon said cross support, said crosssupport received in said space between said angularly disposed memberswhen the movable span is moved to its open position.

A bridge colnprising a main span, a counter-weight support connectedtherewith, a series of angular members connected together to form aplurality of triangles, said angular members connected with saidcounterweight support, concrete connected with said angular members andin which they are embedded.

3, A bascule bridge comprising a fixed portion, a movable portionmounted on trunnions, an inside and outside bearing for the trunnions,an inside support for the inside bearing and a brace between saidsupport and said fixed portion so as to take the horizontal thrust ofsaid inside bearing.

4. A bascule bridge comprising a. main span provided with a plurality oftrusses, a fixed support, a portion of which extends underneath -themain span, 'a counterweight carrying part comprising a member behind thesupport and extending upwardly there` from. a second member extendingupwardly from said first member at av distance from its point ofconnection with the span, said second member also connected with saidspan, a third member projecting rearwardly from the upper chordof themain span, the

three members forming a supporting frame,

a` series of triangular members connected with said frame, acounterweight connected with said triangular members, there being anopen space between said first member and said series of triangularmembers so that said members clear the support in all of the variouspositions of the main span.

5. A bascule bridge comprising a main span, trunnions upon which it ismounted, said main span terminating at'said trunnions, a triangularframe built outifrom said Span toward the rear thereof, a series oftriangular frames carried upon said first mentioned triangular frame asa support, a counterweight carried by said series of triangular frames,said series of triangular frames separated from the first triangularframe by a space open at the bottom, a cross support under said mainspan, said cross support received into said space When the main span isopen A 6. A bridge complising a'main span,a coun- ,Q terweight thereforcomprising a series of triangular trusses connected with said main span,a`series of interconnecting members between said triangular trusses,said trusses and members embedded in concrete.

7.. A bascule bridge comprising la'main 75 span, trusses therefor, aconcrete counter- 'weight therefor comprising a metal bpttom portion,two metal side portions associated with the bottom portion, trussesbetween said side portions and connected to the trusses associatedwiththe main span, said side portions supported on said trusses, thebottom and side portions constituting a self-supporting form forconcrete while the counterweight is being erected.

In testimony whereof, I affix my signature in the presence of twowitnesses this 31st day of March, 1913.

JOSEPH B. STRAUSS.

VVitnesses:

MINNIE M. LINDENAY, MINNIE SUNDFAR.

